What happens when you try to download something? Do files move into the download pane but get stuck connecting & then need more sources forever? Or do the files just sit there & do nothing?
If it's the first scenario, could be fake files. See below for more info & tips (especially using Bitzi to check files before download).
Fake files showing up in search results How to find music (tips for video also)
If it's the second scenario, where files just sit there & don't move to the download pane, try this:
License (click)